Our “Shield Bead Kit” (part number 0199000019) contains a selection of these beads.

For any EMI suppression bead requirement not listed here, feel free to contact our customer service for availability and pricing.

The C dimension, the bead length, can be modified to suit specific applications.

Weight: 0.18 (g)

Dim

mm

mm tol

nominal inch

inch misc.

A

3.5

±0.20

0.138

_

B

1.3

±0.10

0.051

_

C

6

±0.25

0.236

_

Chart Legend+ Test frequency• The column "H (Oe)" gives for each bead the calculated dc bias field in oersted for 1 turn and 1 ampere direct current. The actual dc H field in the application is this value of “H” times the actual NI (ampere-turn) product. For the effect of the dc bias on the impedance of the bead material, see figures 18-23 in the application note How to choose Ferrite Components for EMI Suppression.

Typical Impedance (Ω)

10 MHz

29

25 MHz+

46

100 MHz+

60

250 MHz

83

Electrical Properties

H(Oe)

2

Suppression beads are controlled for impedances only. Minimum impedance values are specified for the + marked frequencies. The minimum impedance is typically the listed impedance less 20%.

Single turn impedance tests for 73 and 43 material beads are performed on the 4193A Vector Impedance Analyzer. The 61 material beads are tested on the 4291A RF Impedance Analyzer. Beads are tested with the shortest practical wire length.

Typical Impendance (Ω)

10 MHz

29

25 MHz+

46

100 MHz+

60

250 MHz

83

This NiZn is our most popular ferrite for suppression of conducted EMI from 20 MHz to 250 MHz. This material is also used for inductive applications such as high frequency common-mode chokes.